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<a href="#define-members">Defines</a> &#124;
<a href="#func-members">Functions</a>  </div>
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<div class="title">Signal Management</div>  </div>
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<p>Control or wait for signal flags.  
<a href="#details">More...</a></p>
<table class="memberdecls">
<tr><td colspan="2"><h2><a name="define-members"></a>
Defines</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group___c_m_s_i_s___r_t_o_s___signal_mgmt.html#ga01edde265710d883b6e237d34a6ef4a6">osFeature_Signals</a>&#160;&#160;&#160;8</td></tr>
<tr><td class="mdescLeft">&#160;</td><td class="mdescRight">maximum number of Signal Flags available per thread  <a href="#ga01edde265710d883b6e237d34a6ef4a6"></a><br/></td></tr>
<tr><td colspan="2"><h2><a name="func-members"></a>
Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int32_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group___c_m_s_i_s___r_t_o_s___signal_mgmt.html#ga029340f7007656c06fdb8eeeae7b056e">osSignalSet</a> (<a class="el" href="cmsis__os_8h.html#adfeb153a84a81309e2d958268197617f">osThreadId</a> thread_id, int32_t signal)</td></tr>
<tr><td class="mdescLeft">&#160;</td><td class="mdescRight">Set the specified Signal Flags of an active thread.  <a href="#ga029340f7007656c06fdb8eeeae7b056e"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int32_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group___c_m_s_i_s___r_t_o_s___signal_mgmt.html#gafcb3a9bd9a3c4c99f2f86d5d33faffd8">osSignalClear</a> (<a class="el" href="cmsis__os_8h.html#adfeb153a84a81309e2d958268197617f">osThreadId</a> thread_id, int32_t signal)</td></tr>
<tr><td class="mdescLeft">&#160;</td><td class="mdescRight">Clear the specified Signal Flags of an active thread.  <a href="#gafcb3a9bd9a3c4c99f2f86d5d33faffd8"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int32_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group___c_m_s_i_s___r_t_o_s___signal_mgmt.html#ga071c0d1c3bdcac9e75fad0b25a5cd8f1">osSignalGet</a> (<a class="el" href="cmsis__os_8h.html#adfeb153a84a81309e2d958268197617f">osThreadId</a> thread_id)</td></tr>
<tr><td class="mdescLeft">&#160;</td><td class="mdescRight">Get Signal Flags status of an active thread.  <a href="#ga071c0d1c3bdcac9e75fad0b25a5cd8f1"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="group___c_m_s_i_s___r_t_o_s___definitions.html#structos_event">osEvent</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group___c_m_s_i_s___r_t_o_s___signal_mgmt.html#ga38860acda96df47da6923348d96fc4c9">osSignalWait</a> (int32_t signals, uint32_t millisec)</td></tr>
<tr><td class="mdescLeft">&#160;</td><td class="mdescRight">Wait for one or more Signal Flags to become signaled for the current <b>RUNNING</b> thread.  <a href="#ga38860acda96df47da6923348d96fc4c9"></a><br/></td></tr>
</table>
<hr/><a name="details" id="details"></a><h2>Description</h2>
<p>The Signal Management function group allows to control or wait signal flags. Each thread has assigned signal flags. </p>
<hr/><h2>Define Documentation</h2>
<a class="anchor" id="ga01edde265710d883b6e237d34a6ef4a6"></a><!-- doxytag: member="cmsis_os.h::osFeature_Signals" ref="ga01edde265710d883b6e237d34a6ef4a6" args="" -->
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          <td class="memname">#define osFeature_Signals&#160;&#160;&#160;8</td>
        </tr>
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<p>The CMSIS-RTOS API may support a variable number of signal flags. This define specifies the number of signal flags available per thread. The maximum value is 31 signal flags per thread. </p>

</div>
</div>
<hr/><h2>Function Documentation</h2>
<a class="anchor" id="gafcb3a9bd9a3c4c99f2f86d5d33faffd8"></a><!-- doxytag: member="cmsis_os.h::osSignalClear" ref="gafcb3a9bd9a3c4c99f2f86d5d33faffd8" args="(osThreadId thread_id, int32_t signal)" -->
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          <td class="memname">int32_t osSignalClear </td>
          <td>(</td>
          <td class="paramtype"><a class="el" href="cmsis__os_8h.html#adfeb153a84a81309e2d958268197617f">osThreadId</a>&#160;</td>
          <td class="paramname"><em>thread_id</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">int32_t&#160;</td>
          <td class="paramname"><em>signals</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
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<div class="memdoc">
<dl><dt><b>Parameters:</b></dt><dd>
  <table class="params">
    <tr><td class="paramdir">[in]</td><td class="paramname">thread_id</td><td>thread ID obtained by <a class="el" href="group___c_m_s_i_s___r_t_o_s___thread_mgmt.html#ga9e8ce62ab5f8c169d025af8c52e715db">osThreadCreate</a> or <a class="el" href="group___c_m_s_i_s___r_t_o_s___thread_mgmt.html#gab1df2a28925862ef8f9cf4e1c995c5a7">osThreadGetId</a>. </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">signals</td><td>specifies the signal flags of the thread that shall be cleared. </td></tr>
  </table>
  </dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>previous signal flags of the specified thread or 0x80000000 in case of incorrect parameters. </dd></dl>
<dl class="note"><dt><b>Note:</b></dt><dd>MUST REMAIN UNCHANGED: <b>osSignalClear</b> shall be consistent in every CMSIS-RTOS.</dd></dl>
<p>Clear the signal flags of an active thread. This function may be used also within interrupt service routines. </p>

</div>
</div>
<a class="anchor" id="ga071c0d1c3bdcac9e75fad0b25a5cd8f1"></a><!-- doxytag: member="cmsis_os.h::osSignalGet" ref="ga071c0d1c3bdcac9e75fad0b25a5cd8f1" args="(osThreadId thread_id)" -->
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          <td class="memname">int32_t osSignalGet </td>
          <td>(</td>
          <td class="paramtype"><a class="el" href="cmsis__os_8h.html#adfeb153a84a81309e2d958268197617f">osThreadId</a>&#160;</td>
          <td class="paramname"><em>thread_id</em></td><td>)</td>
          <td></td>
        </tr>
      </table>
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<div class="memdoc">
<dl><dt><b>Parameters:</b></dt><dd>
  <table class="params">
    <tr><td class="paramdir">[in]</td><td class="paramname">thread_id</td><td>thread ID obtained by <a class="el" href="group___c_m_s_i_s___r_t_o_s___thread_mgmt.html#ga9e8ce62ab5f8c169d025af8c52e715db">osThreadCreate</a> or <a class="el" href="group___c_m_s_i_s___r_t_o_s___thread_mgmt.html#gab1df2a28925862ef8f9cf4e1c995c5a7">osThreadGetId</a>. </td></tr>
  </table>
  </dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>previous signal flags of the specified thread or 0x80000000 in case of incorrect parameters. </dd></dl>
<dl class="note"><dt><b>Note:</b></dt><dd>MUST REMAIN UNCHANGED: <b>osSignalGet</b> shall be consistent in every CMSIS-RTOS.</dd></dl>
<p>Return the event flags of an active thread. This function may be used also within interrupt service routines. Signal flags that are returned are automatically cleared. </p>

</div>
</div>
<a class="anchor" id="ga029340f7007656c06fdb8eeeae7b056e"></a><!-- doxytag: member="cmsis_os.h::osSignalSet" ref="ga029340f7007656c06fdb8eeeae7b056e" args="(osThreadId thread_id, int32_t signal)" -->
<div class="memitem">
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      <table class="memname">
        <tr>
          <td class="memname">int32_t osSignalSet </td>
          <td>(</td>
          <td class="paramtype"><a class="el" href="cmsis__os_8h.html#adfeb153a84a81309e2d958268197617f">osThreadId</a>&#160;</td>
          <td class="paramname"><em>thread_id</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">int32_t&#160;</td>
          <td class="paramname"><em>signals</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div>
<div class="memdoc">
<dl><dt><b>Parameters:</b></dt><dd>
  <table class="params">
    <tr><td class="paramdir">[in]</td><td class="paramname">thread_id</td><td>thread ID obtained by <a class="el" href="group___c_m_s_i_s___r_t_o_s___thread_mgmt.html#ga9e8ce62ab5f8c169d025af8c52e715db">osThreadCreate</a> or <a class="el" href="group___c_m_s_i_s___r_t_o_s___thread_mgmt.html#gab1df2a28925862ef8f9cf4e1c995c5a7">osThreadGetId</a>. </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">signals</td><td>specifies the signal flags of the thread that should be set. </td></tr>
  </table>
  </dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>previous signal flags of the specified thread or 0x80000000 in case of incorrect parameters. </dd></dl>
<dl class="note"><dt><b>Note:</b></dt><dd>MUST REMAIN UNCHANGED: <b>osSignalSet</b> shall be consistent in every CMSIS-RTOS.</dd></dl>
<p>Set the signal flags of an active thread. This function may be used also within interrupt service routines. </p>

</div>
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<a class="anchor" id="ga38860acda96df47da6923348d96fc4c9"></a><!-- doxytag: member="cmsis_os.h::osSignalWait" ref="ga38860acda96df47da6923348d96fc4c9" args="(int32_t signals, uint32_t millisec)" -->
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          <td class="memname"><a class="el" href="group___c_m_s_i_s___r_t_o_s___definitions.html#structos_event">osEvent</a> osSignalWait </td>
          <td>(</td>
          <td class="paramtype">int32_t&#160;</td>
          <td class="paramname"><em>signals</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">uint32_t&#160;</td>
          <td class="paramname"><em>millisec</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
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<div class="memdoc">
<dl><dt><b>Parameters:</b></dt><dd>
  <table class="params">
    <tr><td class="paramdir">[in]</td><td class="paramname">signals</td><td>wait until all specified signal flags set or 0 for any single signal flag. </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">millisec</td><td>timeout value or 0 in case of no time-out. </td></tr>
  </table>
  </dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>event flag information or error code. </dd></dl>
<dl class="note"><dt><b>Note:</b></dt><dd>MUST REMAIN UNCHANGED: <b>osSignalWait</b> shall be consistent in every CMSIS-RTOS.</dd></dl>
<p>Suspend the execution of the current <b>RUNNING</b> thread until all specified signal flags with the parameter <em>signals</em> are set. When this signal flags are already set, the function returns instantly. Otherwise the thread is put into the state <b>WAITING</b>. Signal flags that are reported as event are automatically cleared.</p>
<p>When <em>millisec</em> is set to <b>osWaitForever</b> the function will wait for an inifinite time until a message queue slot becomes available.</p>
<p><b><a class="el" href="group___c_m_s_i_s___r_t_o_s___status.html">Status and Error Codes</a></b><br/>
</p>
<ul>
<li><em>osOK:</em> no signal received when the timeout value <em>millisec</em> was zero.</li>
<li><em>osEventTimeout:</em> signal not occurred within timeout</li>
<li><em>osEventSignal:</em> signal occurred, <em>value.signals</em> contains the signal flags; these signal flags are cleared.</li>
<li><em>osErrorValue:</em> the value <em>signals</em> is outside of the permitted range.</li>
<li><em>osErrorISR:</em> <a class="el" href="group___c_m_s_i_s___r_t_o_s___signal_mgmt.html#ga38860acda96df47da6923348d96fc4c9">osSignalWait</a> cannot be called from interrupt service routines. </li>
</ul>

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